Team:UCLouvain/Basic Part

iGEM UCLouvain Team iGEM UCLouvain Team

Parts

BactaSun
Auxotrophic Approach


Basic parts


Source : iGEM DNA Distribution Kit



pBAD/araC (I0500)

The pBAD promoter is a very common inducible one that is activated by L-arabinose and repressed by araC.



Terminator (B0010)

Terminators are necessary to stop the transcription at the end of a coding sequence.



RBS (B0034)

Efficient ribosome binding site characterized by IIT Madras in iGEM 2016.



RFP (E1010)

Fluorescent proteins are very common reporter genes. This particular one comes from Discosoma striata and was engineered to be monomeric. The excitation peak is at 584 nm, and the emission peak at 607 nm.



Composite parts


piFinal (BBa_K577882)

iGEM plasmid consisting of araC, a pBAD/AraC promoter (I0500), an RBS (B0034), an RFP (E1010), and two terminators (B0010 and B0012) contained inside one biobrick (B0015)

COMR/S Approach

Basic parts


New parts



Protein originally found in Streptococcus thermophilius where it regulates natural competence. The protein activation and binding to specific promoters (ComR Box; BBa_K2341001) is only possible in presence of a short peptide, ComS (LPYFAGCL). Binding to the promoter will induce the downstream sequence expression.



P1655 promoter (BBa_K2341001)

Promote expression of the sequence downstream in presence of ComR (BBa_K2341000) and ComS (LPYFAGCL). Sequence containing the palindrome motif needed to bind ComR (= ComR box).



sgRNA Tyrosin (Cas9 guide) (BBa_K2341100)

RNA guide to use in combination with CRISPR/CAS9. Cut inside the tyrA gene so that deletion by homologous recombination can occur if a homologous DNA strand is also added. RNA guide under constitutive expression by BBa_J23119.



Composite parts


pCMMCD 105

Plasmid consisting of ComR (BBa_K2341000), the p1655 promoter (containing the ComR box, BBa_K2341001), GusA and an erythromycin resistance.

GusA encodes the beta-glucuronidase gene from E. coli. This is a popular reporter gene that uses glucuronides as substrates, the most common of which are X-gluc (5-bromo-4-chloro-3-indolyl glucuronide) and para-nitrophenyl glucuronide.

Here, it is under the control of the ComRS pathway and uses the ComS peptide from S. thermophilius (LPYFAGGL).







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